Burner.



.No. 207,285. I P atented Aug. 19, I902.

' M. 3. WALKER.

'BURNER.

(Applicatioq filed Oct. 7, 1901.)

(N0 llndel.)

Jay

m: NORRIS PETERS cu FHOTOQLITHO. \VASHINGYON. 01c

NITED STATES ATENT OFFICE.

MILO S. WALKER, OF CHICAGO, ILLINOIS, ASSIGNOR OF TWO-THIRDS TO MAX HERSKOVITZ AND ABRAHAM L. HERSKOVITZ, OF CHICAGO,

ILLINOIS.

BYURNER.

SPECIFICATION forming part of Letters Patent No. 707,285, dated August 19, 1902. Application filed October 7,1901. Serial No. 77,828. (No model.)

To aZZ whom it may concern:

Be it known that I, MILO S. WALKER, a citizen of the United States of America, residing at Chicago, in the county of Cook and State of Illin0is,have invented certain new and useful Improvements in Burners, of which the following is a specification.

My invention relates to improvements in gas-burners of the so-oalled Bunsen or colorless-flame type, whether used in the simple laboratory form for heating or in combination with other elements in the incandescent-mantle illuminating-lamp. v

The essential object of the invention is to provide such burners with a mixing device adapted to effect a more perfect combination of air and gas than is attainable in the use of the ordinary Bunsen burner, the purpose being to increase the heating capacity of any given burner operated under any given pressure of gas. In the use of the laboratory burner this means simply thatthe heating capacity of the burner is increased through the use of my improvement, whereas in the use of the incandescent-mantle illuminatingburner it means that a given burner operat-j ing under a given gas-pressure will heat to complete incandescence a larger mantle than,

in an apparatus whereby gas from a suitable. source of supply is delivered under pressure through a small orifice, (preferably in the form of a small tubular nozzle,) thereby form-:, ing a swiftly-moving. jet, and whereby also the jet thus formed is passed through a second limited opening, (preferably tubular,) so that the jet of gas operates on the principle of an injector, with the result that air is drawn toward the jet of gas and is carried with it through said second orifice, the gas and air being thereby thoroughly mixed. This device, which may be called a primary mixer, may deliver the mixture of air and gas so formed into the ordinary mixing-tube of a Bunsen burner provided with openings either subject to regulation or not, as the case may be, whereby the air and gas from the primary mixer may receive in said mixingin the tube.

ings a for the admission of air into its inte- I rior,.the partof the tube so perforated being encircled by a skirt B, which hides the openings and serves as a shield to prevent a direct current of air from passing across the openings a. 0n the upper part of the tube A is a. second sleeve 0, carrying at its lower end the usual chimney-support D and at its upper end the tubular gas-chamber E. The upper end of the chamber E is provided with one or more wire-gauze diaphragms E, such as are ordinarily used in-burners of this type,

and the mantleF is supported above the chamber E in any suitable way, so that the lower end of the mantle encircles the upper end of the chamber E. So far as all these details are concerned they correspond to the ordinary construction of illuminating-burners of this general type, and they are only shown for the purpose of illustrating the ap- ;plication of my improvement to a burner of this class. In the use of such burners heretofore it has been common to supply gas to the lower end of the mixing-tube of the Bunsen burner by means of a suitable tip screwed to the gas-fixture and screwed into the lower end of the Bunsen-burner tube, one usual form of such tip being that of a tube having at its upper end a flat disk formed with a series of small perforations, the gas being deliver-ed through these perforations directly into the tubeof the Bunsen burner and there mixed with air entering thelateral openings It will be seen, however, that in this apparatus the ordinary mixing-tube of the Bunsen burneris supplemented by the device shown, in which G is a mixing-chamber formed with openings 9 for the admission of air, and below the openings g is a hollow plug H, which supports a tubular nipple I, and screwed upon the ordinary gas-fixture and immediately above the upper end of the nipple or nozzle I is a tubular passage K, secured in the tube G and preferably having a number of perforations 7t 7c in its wall. As

' shown, a diaphragm L, set in the tube G, separates the lower portion of the mixing-chamber from the upper, and in the construction here shown the tubular passage is formed by a tube K, set in said diaphragm in alinement with the nipple or nozzle I. Said tube may be perforated both above and below the diaphragm to allow a certain amount of air to be drawn into the jet of gas and air mixture, which enters at the lower end of said passage. It is preferable that the openings gin the lower part of the mixing-chamber be regulated as to size, and for this reason an inner perforated ring M is shown, having a projecting tang m, by means of which it may be turned to regulate the size of the openings, and consequently the amount of air drawn into the burner at this point. It is apparent that any gas delivered to this burner from the gas-fixture must pass through the nozzle 1, that it will thus form a jet moving at a considerable speed, that this jet must pass through the tubular passage K, that in its movement the jet will draw inward and carry upward a constant supply of air entering the tube G through the openings 9, and that as the air so drawn inward toward the jet of gas moves upward with it, some of the air being drawn through the perforations in the tubular passage as the jet is passing through the latter, the air and gas will thereby be mixed, and the mixture will be delivered to the chamber within the tube A-that is, to the ordinary mixing-chamber of the Bunsen burner. I have found by thorough experiment that the mingling of air and gas efiected by this primary mixer greatly augments the efficiency of the burner operating under any given pressure of gas and that in many cases the mixing so effected is sufficient for all practical purposes without any further addition of air; but I prefer to deliver the mixed air and gas from the primary mixer into the perforated tube of the Bunsen burner in order to provide for the admission of a further supply of air above the diaphragm I1 whenever such further admission of air is found necessary or desirable.

The perforated tube K is of great importance in that while directing and increasing the suction of the air created by the current of gas it at the same time affords ready access for the air to the interior, effecting a much more thorough mixing than would be possible without the perforations.

I claim as new and desire to secure by Letters Patent- 1. In a gas-burner of the general class described a mixing-chamber having a small orifice for the admission of a jet of gas under pressure, a tubular passage open at both ends, supported within said chamber in line with said orifice, having a series of perforations in its wall, and means for admitting asupply of air to the mixing-chamber, whereby the jet of gas flows through said tubular passage and carries with it the air so admitted to the mixing-chamber; substantially as described.

2. In a gas-burner of the general class described, a mixing-chamber having a nozzle of small diameter adapted to admit a jet of gas under pressure, a perforated tube open at both ends within said chamber and in line with said nozzle and means for admitting a supply of air to the mixing-chamber, whereby the jet of gas flows through said tube and carries with it the air so admitted to the mixingchamber; substantially as described.

3. In a gas-burner of the general class described, the combination with the tubular chamber of a Bunsen burner, having an opening in its wall for the admission of air, of a diaphragm below said opening, a perforated tube extending through said diaphragm, a nozzle in line with said tube and in comm unication with a source of supply of gas under pressure, whereby a jet of gas may be discharged from said nozzle, through said tube and into said chamber, and means for admitting a supply of air to be carried by and with said jet into said chamber; substantially as described.

4. In a gas-burner of the general class described, the combination with the tubular chamber of a Bunsen burner, having an opening in its wall for the admission of air, and provided with a perforated inlet-tube below said openings said tube being of less diameter than the tube of the burner, of a nozzle of small diameter, in line with said tube and opening into a source of supply of gas under pressure, whereby a jet of gas may be discharged from said nozzle through said tube and into said chamber, and means for admitting a supply of air to be carried by and with said jet into said chamber; substantially as described.

In witness whereof I have hereunto set my hand at Chicago, in the county of Cook and State of Illinois, this 1st day of October, A. D. 1901.

MILO S. WALKER.

Witnessess:

CHAS. O. SHERVEY, S. Bass. 

